first class

first class
    adv 1: by first class conveyance; with first class
           accommodations; "we always travel first class"
    n 1: the highest rank in a classification
    2: mail that includes letters and postcards and packages sealed
       against inspection [syn: {first class}, {1st class}, {first-
       class mail}, {1st-class mail}]
    3: the most expensive accommodations on a ship or train or plane
    

21 Moby Thesaurus words for "first class":
      best, first-chop, first-rate, greatest, highest, maximal, maximum,
      most, superlative, supreme, tip-top, top, top-drawer, top-hole,
      top-notch, topflight, topmost, topping, tops, uppermost, utmost